Performance Statistics (API Guide)

Go Up to Request Buffer Items and Result Buffer Values (API Guide)

There are four items that request performance statistics for a database. These statistics accumulate for a database from the moment it is first attached by any process until the last remaining process detaches from the database.

For example, the value returned for isc_info_reads is the number of reads since the current database was first attached, that is, an aggregate of all reads done by all attached processes, rather than the number of reads done for the calling program since it attached to the database.

The following table summarizes the request performance statistics:

Request buffer item	Result buffer contents
fetches	Number of reads from the memory buffer cache
marks	Number of writes to the memory buffer cache
reads	Number of page reads
writes	Number of page writes

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• Database Operation Counts (API Guide)